US3805112A - Light source apparatus for endoscope - Google Patents

Light source apparatus for endoscope Download PDF

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Publication number
US3805112A
US3805112A US00212919A US21291971A US3805112A US 3805112 A US3805112 A US 3805112A US 00212919 A US00212919 A US 00212919A US 21291971 A US21291971 A US 21291971A US 3805112 A US3805112 A US 3805112A
Authority
US
United States
Prior art keywords
rectifier
lamp
switch
charging circuit
condenser
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00212919A
Other languages
English (en)
Inventor
K Tsumura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Machida Endoscope Co Ltd
Original Assignee
Machida Endoscope Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Machida Endoscope Co Ltd filed Critical Machida Endoscope Co Ltd
Application granted granted Critical
Publication of US3805112A publication Critical patent/US3805112A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
    • A61B1/0661—Endoscope light sources
    • A61B1/0669—Endoscope light sources at proximal end of an endoscope
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00002—Operational features of endoscopes
    • A61B1/00025—Operational features of endoscopes characterised by power management
    • A61B1/00027—Operational features of endoscopes characterised by power management characterised by power supply
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/30—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp
    • H05B41/32—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp for single flash operation

Definitions

  • This invention has as an object the provision of a light source apparatus wherein multiple light sources are not employed and instead a single continuous type light source is used which can also be used as a flash type light source for still photography.
  • the transformer 9 is provided with a third winding 90, and a charging condenser 13 is connected thereto through a diode 12. Additionally, a pulse transformer is connected to the condenser 13 through a synchroswitch 14 of a photographic camera. One output terminal of the pulse transformer 15 is connected to the control electrode of the above-mentioned silicon control rectifier 28.
  • FIG. 2 shows a modified circuit wherein the opening of the silicon control rectifier can be effected automatically.
  • a discharge resistance 17 is provided in parallel with the discharging condenser 8 and a change-over switch 18 for selectively connecting the condenser 8 either with the charging circuit 7 or the discharge resistance 17 is provided.
  • a control circuit 20 having a relay coil 19 arranged to operate for a predetermined time after the condenser 8 is lowered to a predetermined voltage level by discharging is provided in parallel with the condenser 8.
  • a second change-over switch 25 for selectively connecting the discharging condenser 8 to either the charging circuit 7 or the discharge resistance 17.
  • This switch 25 is so arranged that it closes the charging circuit 7 as illustrated when a relay coil 26 provided on the electric source side of the regular lighting circuit for the arc lamp 1 is operated, but it closes the discharging circuit when the relay coil 26 becomes inoperative.
  • Circuit 27 is a circuit for generating a pulse for lamp ignition.
  • the charging circuit includes an alternating current source, a transformer, a resistance and diode connected in series to said discharging capacitor.
  • Apparatus as claimed in claim 3 comprising a diode and condenser coupled between said synchroswitch and transformer and a pulse transformer coupling said switch to said rectifier.
  • Apparatus as claimed in claim 2 wherein the latter said means for operating automatically includes a discharge resistance, a change-over switch for selectively coupling said discharging capacitor to said charging circuit or discharge resistance, and relay means to operate the change-over switch.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Biomedical Technology (AREA)
  • Medical Informatics (AREA)
  • Optics & Photonics (AREA)
  • Pathology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Biophysics (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Endoscopes (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
US00212919A 1971-01-21 1971-12-28 Light source apparatus for endoscope Expired - Lifetime US3805112A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP139171 1971-01-21

Publications (1)

Publication Number Publication Date
US3805112A true US3805112A (en) 1974-04-16

Family

ID=11500177

Family Applications (1)

Application Number Title Priority Date Filing Date
US00212919A Expired - Lifetime US3805112A (en) 1971-01-21 1971-12-28 Light source apparatus for endoscope

Country Status (2)

Country Link
US (1) US3805112A (enExample)
DE (1) DE2161397C3 (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4045708A (en) * 1975-08-28 1977-08-30 General Electric Company Discharge lamp ballast circuit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5336980A (en) * 1976-09-16 1978-04-05 Olympus Optical Co Light source for endscope
US4171572A (en) * 1977-12-22 1979-10-23 Star Dental Manufacturing Co., Inc. Light control apparatus for a dental handpiece

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3591829A (en) * 1967-04-20 1971-07-06 Minolta Camera Kk Automatic control device for electronic flash

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3591829A (en) * 1967-04-20 1971-07-06 Minolta Camera Kk Automatic control device for electronic flash

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4045708A (en) * 1975-08-28 1977-08-30 General Electric Company Discharge lamp ballast circuit

Also Published As

Publication number Publication date
DE2161397A1 (enExample) 1972-08-03
DE2161397C3 (de) 1975-03-20
DE2161397B2 (de) 1974-07-18

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